Path: utzoo!mnetor!uunet!mcvax!enea!kuling!irf
From: irf@kuling.UUCP (Bo Thide)
Newsgroups: comp.editors
Subject: 'lvi' -- the learner's 'vi'
Message-ID: <608@kuling.UUCP>
Date: 18 Jan 88 21:55:38 GMT
Reply-To: irf@kuling.UUCP (Bo Thide)
Organization: Dept. of Computer Systems, Uppsala University, Sweden
Lines: 279


This is 'lvi', a script for 'vi' learners.  The file ..../vi.help
is identical to the one in 'nvi' which I posted to comp.editors yesterday.
'lvi' is in use on our HP-UX computers.  I have not tested 'lvi' on any
other system.

Comments/corrections welcome. Enjoy!

--Bo

>>> Bo Thide', Swedish Institute of Space Physics, S-755 90 Uppsala, Sweden <<<
 Phone (+46) 18-300020.  Telex: 76036 (IRFUPP S).  UUCP: ..enea!kuling!irfu!bt

#---------------------------------- cut here ----------------------------------
# This is a shell archive.  Remove anything before this line,
# then unpack it by saving it in a file and typing "sh file".
#
# Wrapped by bt at irfu on Mon Jan 18 00:11:24 1988
#
# This archive contains:
#	lvi.doc				/usr/local/bin/lvi		
#	/usr/local/lib/vi/lvi.map	/usr/local/lib/vi/lvi.unmap	
#	/usr/local/lib/vi/vi.help	/usr/local/lib/vi/tags/lvi	
#	/usr/local/lib/vi/tags/lvi.init	
#

echo x - lvi.doc
cat >lvi.doc <<'@EOF'

	   LVI -- The Learner's introduction to VI

          (Test Version.  Release 0.1 Jan 15, 1988)

                              by
 
                          Bo Thide'
              Swedish Institute of Space Physics
                   S-755 90 Uppsala, Sweden
        UUCP: ..enea!kuling!irfu!bt  or  bt@irfu.UUCP
 

This  is a test  version  of a  macro  package  providing  a
learner's  interface to the vi(1) editor  family.  You start
by typing 'lvi  <filename>'  and then a tags file containing
an introductory  text is displayed.  After that, just follow
the  instructions.  You can even safely use a vi(1)  command
that would  normally in some way alter the  contents  of the
tags  file  since  all such  dangerous  commands  have  been
":map"ped  away.  Only if you use ":"  followed  by an ex(1)
command is it possible to damage the tags file.  It does not
seem to be possible to ":map"  ex(1)  commands.  At least on
the  system  (HP-UX) I have tried such a mapping  yields the
message "Too dangerous to map that".

After  hitting  ^C you enter into the first of the files you
want to edit.  At the same time a help line is displayed  at
the bottom of the screen.  This line also  appears  when you
hit <CR> in command mode, something that unexperienced users
tend to do now and then.  In all other  respects,  vi(1) now
behaves in a normal way.
@EOF

chmod 644 lvi.doc

echo Compiling unpacker for non-ascii files
pwd=`pwd`; cd /tmp
cat >unpack$$.c <<'EOF'
#include <stdio.h>
#define DEC(c)	(((c) - ' ') & 077)
main()
{
	int n;
	char dest[128], a,b,c,d;

	scanf("begin %o ", &n);
	gets(dest);

	if (freopen(dest, "w", stdout) == NULL) {
		perror(dest);
		exit(1);
	}

	while ((n=getchar()) != EOF && (n=DEC(n))!=0)  {
		while (n>0) {
			a = DEC(getchar());
			b = DEC(getchar());
			c = DEC(getchar());
			d = DEC(getchar());
			if (n-- > 0) putchar(a << 2 | b >> 4);
			if (n-- > 0) putchar(b << 4 | c >> 2);
			if (n-- > 0) putchar(c << 6 | d);
		}
		n=getchar();
	}
	exit(0);
}
EOF
cc -o unpack$$ unpack$$.c
rm unpack$$.c
cd $pwd

echo x - /usr/local/bin/lvi '[non-ascii]'
/tmp/unpack$$ <<'@eof'
begin 755 /usr/local/bin/lvi
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,("UT(&EN:70@)"H*
 
end
@eof

chmod 755 /usr/local/bin/lvi

echo x - /usr/local/lib/vi/lvi.map '[non-ascii]'
/tmp/unpack$$ <<'@eof'
begin 644 /usr/local/lib/vi/lvi.map
M.FUA<" #(#IR97<-.G-O("]U<W(O;&]C86PO;&EB+W9I+VQV:2YU;FUA< TZ
M(D5N=&5R(#Q#5%),/BU!(&9O<B!!<W-I<W1A;F-E+@T*.FUA<"!A(#HB3F]T
M('EE="$@2&ET('$@=&\@8F%I;"!O=70L(%Y#('1O(&-O;G1I;G5E+"!O<B Z
M(6UA;B!V:3Q#4CX@9F]R(&UO<F4@:6YF;RX-"CIM87 @02!A"CIM87 @8R!A
M"CIM87 @0R!A"CIM87 @9"!A"CIM87 @1"!A"CIM87 @:2!A"CIM87 @22!A
M"CIM87 @2B!A"CIM87 @;R!A"CIM87 @3R!A"CIM87 @<"!A"CIM87 @4"!A
M"CIM87 @<2 S-$<Z<2$*.FUA<"!1(&$*.FUA<"!R(&$*.FUA<"!2(&$*.FUA
M<"!S(&$*.FUA<"!3(&$*.FUA<"!U(&$*.FUA<"!5(&$*.FUA<"!X(&$*.FUA
M<"!8(&$*.FUA<" A(&$*.FUA<" F(&$*.FUA<" N(&$*.FUA<" \(&$*.FUA
A<" ^(&$*.FUA<"!^(&$*.FUA<" =(&$*.FUA<" >(&$*
 
end
@eof

chmod 644 /usr/local/lib/vi/lvi.map

echo x - /usr/local/lib/vi/lvi.unmap '[non-ascii]'
/tmp/unpack$$ <<'@eof'
begin 644 /usr/local/lib/vi/lvi.unmap
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@<F4@+W5S<B]L;V-A;"]L:6(O=FDO=FDN:&5L<!L-80H!
 
end
@eof

chmod 644 /usr/local/lib/vi/lvi.unmap

echo x - /usr/local/lib/vi/vi.help
cat >/usr/local/lib/vi/vi.help <<'@EOF'
a [A]  append after cursor [line]      w [W]  word ["word"]
b [B]  back one word ["word"]          x [X]  cross out char at [before] cursor
c [C]  change next [to end of line]    y [Y]  yank next [whole line]
d [D]  delete next [to end of line]    zpos   redraw zone at pos (.,-, or CR)
e [E]  end of word ["word"]            ZZ     write changes to file, exit editor
f [F]  find next [previous] in line    ^B[^F] backward [forward] paging
G [nG] go to last [nth] line in file   ^D[^U] downward [upward] scrolling 
h [l]  cursor left [right]             ^D[^T] delete [tab] one sw during insert
H [L]  to home [last] line on screen   ^E[^Y] expose 1 more line at bottom [top]
i [I]  insert before cursor [line]     ^G     get file name and statistics 
j [k]  cursor down [up]                ~      change case (upper/lower) of char 
J      join line with next             + [-]  to first char in next [prev] line
mx[`x] mark [return to] position 'x'   0 [$]  to first [last] character in line
M      to midpoint on screen           ; [,]  repeat [reverse] last f,F,t, or T
n [N]  to next [previous] occurrence   .      repeat last change of the text
o [O]  open a line below [above]       <<[>>] shift line one sw left [right]
p [P]  put in after [before]           ( [)]  to beginning of [next] sentence
Q      quit 'vi', go to 'ex'           { [}]  to beginning of [next] paragraph
r [R]  replace 1 [all] character[s]    / [?]  search forward [backward]
s [S]  substitute next [to end of line]``[''] return to previous position [line]
t [T]  to next [previous] in line      : [:!] execute 'ex' [shell] command
u [U]  undo last change in file [line] ! [!!] shell command on next [this line]
PREPEND BY n TO REPEAT n TIMES. TYPE <ESC> TO RETURN FROM INPUT TO COMMAND MODE!

Type <ESC><ESC> and wait for 'vi' to confirm with a beep that it is in command
mode. Then a large variety of ':' ("last line commands") are avilable:

SUBSTITUTIONS:
:s/<pattern>/new/<CR>            change FIRST <pattern> in CURRENT LINE to 'new'
:s/<pattern>/new/g<CR>           change ALL <pattern>s in CURRENT LINE to 'new'
:%s/<pattern>/new/g<CR>          change ALL <pattern>s in ALL LINES to 'new'
:s/\(<pat1>\)\(<pat2>\)/\2new\1/ change FIRST occurrence of <pat1><pat2> in
				 CURRENT LINE to <pat2>'new'<pat1>. 
:g/<pat1>/s/<pat2>/new$/         ONLY in lines containing <pat1> change <pat2>
                                 to 'new' ONLY AT THE END OF THE LINE.
:.,+ns/^./new/                   change in CURRENT and FOLLOWING n lines ANY
                                 character at the BEGINNING of the line to 'new'
:%s/<pattern>/new1&new2/g        change ALL <pattern>s in ALL lines to the
				 combination 'new1'<pattern>'new2'
    <pattern>    means
    aaa        the string 'aaa' 
    [aA]aa     the string 'aaa' OR the string 'Aaa'
    [^A]aa     the string 'xaa' where 'x' is any character EXCEPT 'A'
    a*         the strings '', 'a', 'aa', 'aaa', ... 

plus more advanced types of <patterns>; see tutorials on 'ed', 'ex' and 'vi'.

Such patterns can also be used in searches ('/' and '?' on the previous page).
Type 'u' to undo a substitution!
@EOF

chmod 644 /usr/local/lib/vi/vi.help

echo x - /usr/local/lib/vi/tags/lvi
cat >/usr/local/lib/vi/tags/lvi <<'@EOF'
delete	/usr/local/lib/vi/tags/lvi.delete	1
help	/usr/local/lib/vi/tags/lvi.help		1
init	/usr/local/lib/vi/tags/lvi.init		1
insert	/usr/local/lib/vi/tags/lvi.insert	1
move	/usr/local/lib/vi/tags/lvi.move		1
quit	/usr/local/lib/vi/tags/lvi.quit		1
@EOF

chmod 644 /usr/local/lib/vi/tags/lvi

echo x - /usr/local/lib/vi/tags/lvi.init
cat >/usr/local/lib/vi/tags/lvi.init <<'@EOF'
     This is 'lvi' - the learner's introduction to the visual editor 'vi'.
-----------------------------------------------------------------------bt 870830
Only an emergency exit command 'q' and some safe 'vi' "move-around" commands can
be used at this point. (Try them out! Always type '1G' to return to this page):
(^X means holding down <CTRL> key while typing 'X'; <CR> means carriage return)

   q                quit 'lvi' here and now.  WARNING: NO CHANGES RECORDED!
   ZZ               quit 'lvi' after recording changes in your file(s).
   ^F (^B)          Forward (Backward) page by page.
   ^D (^U)          Downward (Upward) scrolling.
   h j k l          move cursor left, down, up, and right, respectively.
   1G               go to line 1 in the file. nG for line n, G for last line.
   /<pattern><CR>   find <pattern>. E.g. to find "home" type /home<CR> (Try it!)
   ^L               redraw screen ("Form Feed").
   ^C               Continue your editing session. Valid only here in help mode!

Typing ^C will take you into command mode in the first file.  There you may use
ALL 'vi' commands, e.g. 'a' for Appending text and <ESC> to end the text insert/
append mode. At any time during your editing session you may get help by typing:

   ^A               get Assistance. Valid both here and in normal 'lvi' modes!
--------------------------------------------------------------------------------








If you really want to QUIT WITHOUT RECORDING ANY CHANGES, type:  <CR> or <ESC>

If you don't want to quit but INTERRUPT and GO BACK to line 1, type:   <DEL>1G













@EOF

chmod 644 /usr/local/lib/vi/tags/lvi.init

rm /tmp/unpack$$
exit 0
-- 
>>> Bo Thide', Swedish Institute of Space Physics, S-755 90 Uppsala, Sweden <<<  Phone (+46) 18-300020.  Telex: 76036 (IRFUPP S).  UUCP: ..enea!kuling!irfu!bt